Appropriate Material Properties for Advective–Diffusive Solute Flux in Membrane Soil
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 130, Issue 12
Abstract
A generalized advective–diffusive equation for describing electrolytic solute transport in fine-grained soil (clay) membranes is presented. Clarification is made between the current theory and the widely cited coupled-flow theory by Yeung and Mitchell. Results of recently published experimental data are evaluated to demonstrate that the effective diffusion coefficient associated with Fick’s first law is not an appropriate independent material property for solute transport considerations in membrane soil. Three independent and experimentally attainable material properties are identified, specifically: osmotic efficiency, membrane diffusion coefficient, and hydraulic conductivity. Simple physical experiments by which these properties may be measured are described.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 130 • Issue 12 • December 2004
Pages: 1341 - 1346
Copyright
Copyright © 2004 ASCE.
History
Published online: Nov 15, 2004
Published in print: Dec 2004
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